21763498331 has 2 divisors, whose sum is σ = 21763498332. Its totient is φ = 21763498330.

The previous prime is 21763498259. The next prime is 21763498333. The reversal of 21763498331 is 13389436712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21763498331 - 2¹⁴ = 21763481947 is a prime.

It is a super-2 number, since 2×21763498331² (a number of 21 digits) contains 22 as substring.

Together with 21763498333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21763498333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10881749165 + 10881749166.

It is an arithmetic number, because the mean of its divisors is an integer number (10881749166).

Almost surely, 2^21763498331 is an apocalyptic number.

21763498331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21763498331 is an equidigital number, since it uses as much as digits as its factorization.

21763498331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 47.

The spelling of 21763498331 in words is "twenty-one billion, seven hundred sixty-three million, four hundred ninety-eight thousand, three hundred thirty-one".